I was stuck using the BT-LH80 this past weekend and have one major gripe about it that does not apply to the LH900. The LH80's apparent brightness changes significantly depending on the vertical viewing angle. This made it very unsettling in terms of exposure. Yes, I know it has a waveform built in, but on the fly, I like to know that what I'm seeing is what I'm getting. There's no question with the LH900.

Also, the absence of a switched out makes it impossible to loop through-not a problem for everyone, but an issue for me.